[PATCH 3/4] net: dev_is_mac_header_xmit() return false for ARPHRD_PUREIP

[Rocco Yue]

the incoming/outgoing packets on that pure ip interface do
not have an ethernet header. So adding ARPHRD_PUREIP to the
dev_is_mac_header_xmit() make the function return false, and
__bpf_redirect() checks this boolean to determine whether to
prefix an ethernet header.

Signed-off-by: Rocco Yue <rocco.yue@xxxxxxxxxxxx>
---
 include/linux/if_arp.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/if_arp.h b/include/linux/if_arp.h
index bf5c5f32c65e..0dc7af11c463 100644
--- a/include/linux/if_arp.h
+++ b/include/linux/if_arp.h
@@ -51,6 +51,7 @@ static inline bool dev_is_mac_header_xmit(const struct net_device *dev)
 	case ARPHRD_VOID:
 	case ARPHRD_NONE:
 	case ARPHRD_RAWIP:
+	case ARPHRD_PUREIP:
 		return false;
 	default:
 		return true;
-- 
2.18.0